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Annotation of src/lib/libedit/readline.c, Revision 1.4

1.4     ! christos    1: /*     $NetBSD: readline.c,v 1.3 1997/11/12 21:56:05 thorpej Exp $     */
1.1       christos    2:
                      3: /*-
                      4:  * Copyright (c) 1997 The NetBSD Foundation, Inc.
                      5:  * All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to The NetBSD Foundation
                      8:  * by Jaromir Dolecek.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the NetBSD
                     21:  *     Foundation, Inc. and its contributors.
                     22:  * 4. Neither the name of The NetBSD Foundation nor the names of its
                     23:  *    contributors may be used to endorse or promote products derived
                     24:  *    from this software without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     27:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     28:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     29:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     30:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     31:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     32:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     33:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     34:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     35:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     36:  * POSSIBILITY OF SUCH DAMAGE.
                     37:  */
                     38:
                     39: #include <sys/cdefs.h>
                     40: #if !defined(lint) && !defined(SCCSID)
1.4     ! christos   41: __RCSID("$NetBSD: readline.c,v 1.3 1997/11/12 21:56:05 thorpej Exp $");
1.1       christos   42: #endif /* not lint && not SCCSID */
                     43:
                     44: #include <sys/types.h>
                     45: #include <sys/stat.h>
                     46: #include <stdio.h>
                     47: #include <dirent.h>
                     48: #include <string.h>
                     49: #include <pwd.h>
                     50: #include <ctype.h>
                     51: #include <stdlib.h>
                     52: #include <unistd.h>
                     53: #include <limits.h>
                     54: #include "histedit.h"
                     55: #include "readline.h"
                     56: #include "sys.h"
                     57: #include "el.h"
                     58:
                     59: /* for rl_complete() */
                     60: #define TAB            '\r'
                     61:
                     62: /* see comment at the #ifdef for sense of this */
                     63: #define GDB_411_HACK
                     64:
                     65: /* readline compatibility stuff - look at readline sources/documentation */
                     66: /* to see what these variables mean */
                     67: const char     *rl_library_version = "EditLine wrapper";
                     68: char           *rl_readline_name = "";
                     69: FILE           *rl_instream = NULL;
                     70: FILE           *rl_outstream = NULL;
                     71: int             rl_point = 0;
                     72: int             rl_end = 0;
                     73: char           *rl_line_buffer = NULL;
                     74:
                     75: int             history_base = 1;      /* probably never subject to change */
                     76: int             history_length = 0;
                     77: int             max_input_history = 0;
                     78: char            history_expansion_char = '!';
                     79: char            history_subst_char = '^';
                     80: char           *history_no_expand_chars = " \t\n=(";
                     81: Function       *history_inhibit_expansion_function = NULL;
                     82:
                     83: int             rl_inhibit_completion = 0;
                     84: int             rl_attempted_completion_over = 0;
                     85: char           *rl_basic_word_break_characters = " \t\n\"\\'`@$><=;|&{(";
                     86: char           *rl_completer_word_break_characters = NULL;
                     87: char           *rl_completer_quote_characters = NULL;
                     88: CPFunction     *rl_completion_entry_function = NULL;
                     89: CPPFunction    *rl_attempted_completion_function = NULL;
                     90:
                     91: /* used for readline emulation */
                     92: static History *h = NULL;
                     93: static EditLine *e = NULL;
                     94:
                     95: /* internal functions */
                     96: static unsigned char _el_rl_complete __P((EditLine *, int));
                     97: static char *_get_prompt __P((EditLine *));
1.2       christos   98: static HIST_ENTRY *_move_history __P((int));
1.1       christos   99: static int _history_search_gen __P((const char *, int, int));
                    100: static int _history_expand_command __P((const char *, int, char **));
                    101: static char *_rl_compat_sub __P((const char *, const char *,
                    102:      const char *, int));
                    103: static int rl_complete_internal __P((int));
                    104:
                    105: /*
                    106:  * needed for easy prompt switching
                    107:  */
                    108: static char    *el_rl_prompt = NULL;
                    109: static char *
                    110: _get_prompt(el)
                    111:        EditLine *el;
                    112: {
                    113:        return el_rl_prompt;
                    114: }
                    115:
                    116: /*
                    117:  * generic function for moving around history
                    118:  */
1.2       christos  119: static HIST_ENTRY *
1.1       christos  120: _move_history(op)
                    121:        int op;
                    122: {
                    123:        HistEvent ev;
                    124:        static HIST_ENTRY rl_he;
                    125:
                    126:        if (history(h, &ev, op) != 0)
                    127:                return (HIST_ENTRY *) NULL;
                    128:
                    129:        rl_he.line = ev.str;
                    130:        rl_he.data = "";
                    131:
                    132:        return &rl_he;
                    133: }
                    134:
                    135:
                    136: /*
                    137:  * READLINE compatibility stuff
                    138:  */
                    139:
                    140: /*
                    141:  * initialize rl compat stuff
                    142:  */
                    143: int
                    144: rl_initialize()
                    145: {
                    146:        HistEvent ev;
                    147:        const LineInfo *li;
                    148:
                    149:        if (e != NULL)
                    150:                el_end(e);
                    151:        if (h != NULL)
                    152:                history_end(h);
                    153:
                    154:        if (!rl_instream)
                    155:                rl_instream = stdin;
                    156:        if (!rl_outstream)
                    157:                rl_outstream = stdout;
1.4     ! christos  158:        e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
1.1       christos  159:
                    160:        h = history_init();
                    161:        if (!e || !h)
                    162:                return -1;
                    163:
1.4     ! christos  164:        history(h, &ev, H_SETSIZE, INT_MAX);    /* unlimited */
1.1       christos  165:        history_length = 0;
                    166:        max_input_history = INT_MAX;
                    167:        el_set(e, EL_HIST, history, h);
                    168:
                    169:        /* for proper prompt printing in readline() */
                    170:        el_rl_prompt = strdup("");
                    171:        el_set(e, EL_PROMPT, _get_prompt);
                    172:        el_set(e, EL_SIGNAL, 1);
                    173:
                    174:        /* set default mode to "emacs"-style and read setting afterwards */
                    175:        /* so this can be overriden */
                    176:        el_set(e, EL_EDITOR, "emacs");
                    177:
                    178:        /* for word completition - this has to go AFTER rebinding keys */
                    179:        /* to emacs-style */
                    180:        el_set(e, EL_ADDFN, "rl_complete",
                    181:               "ReadLine compatible completition function",
                    182:               _el_rl_complete);
                    183:        el_set(e, EL_BIND, "^I", "rl_complete", NULL);
                    184:
                    185:        /* read settings from configuration file */
                    186:        el_source(e, NULL);
                    187:
                    188:        /* some readline apps do use this */
                    189:        li = el_line(e);
                    190:        rl_line_buffer = (char *) li->buffer;
                    191:        rl_point = rl_end = 0;
                    192:
                    193:        return 0;
                    194: }
                    195:
                    196: /*
                    197:  * read one line from input stream and return it, chomping
                    198:  * trailing newline (if there is any)
                    199:  */
                    200: char *
                    201: readline(const char *prompt)
                    202: {
                    203:        HistEvent ev;
1.3       thorpej   204:        int count;
1.1       christos  205:        const char *ret;
                    206:
                    207:        if (e == NULL || h == NULL)
                    208:                rl_initialize();
                    209:
                    210:        /* set the prompt */
                    211:        if (strcmp(el_rl_prompt, prompt) != 0) {
                    212:                free(el_rl_prompt);
                    213:                el_rl_prompt = strdup(prompt);
                    214:        }
                    215:        /* get one line from input stream */
                    216:        ret = el_gets(e, &count);
                    217:
                    218:        if (ret && count > 0) {
                    219:                char *foo;
                    220:                off_t lastidx;
                    221:
                    222:                foo = strdup(ret);
                    223:                lastidx = count - 1;
                    224:                if (foo[lastidx] == '\n')
                    225:                        foo[lastidx] = '\0';
                    226:
                    227:                ret = foo;
                    228:        } else
                    229:                ret = NULL;
                    230:
                    231:        history(h, &ev, H_GETSIZE);
                    232:        history_length = ev.num;
                    233:
                    234:        return (char *) ret;
                    235: }
                    236:
                    237: /*
                    238:  * history functions
                    239:  */
                    240:
                    241: /*
                    242:  * is normally called before application starts to use
                    243:  * history expansion functions
                    244:  */
                    245: void
                    246: using_history()
                    247: {
                    248:        if (h == NULL || e == NULL)
                    249:                rl_initialize();
                    250: }
                    251:
                    252: /*
                    253:  * substitute ``what'' with ``with'', returning resulting string; if
                    254:  * globally == 1, substitutes all occurences of what, otherwise only the
                    255:  * first one
                    256:  */
                    257: static char    *
                    258: _rl_compat_sub(str, what, with, globally)
                    259:        const char     *str, *what, *with;
                    260:        int             globally;
                    261: {
                    262:        char           *result;
                    263:        const char     *temp, *new;
                    264:        int             size, len, i, with_len, what_len, add;
                    265:
                    266:        result = malloc((size = 16));
                    267:        temp = str;
                    268:        with_len = strlen(with);
                    269:        what_len = strlen(what);
                    270:        len = 0;
                    271:        do {
                    272:                new = strstr(temp, what);
                    273:                if (new) {
                    274:                        i = new - temp;
                    275:                        add = i + with_len;
                    276:                        if (i + add + 1 >= size) {
                    277:                                size += add + 1;
                    278:                                result = realloc(result, size);
                    279:                        }
                    280:                        (void)strncpy(&result[len], temp, i);
                    281:                        len += i;
                    282:                        (void)strcpy(&result[len], with);       /* safe */
                    283:                        len += with_len;
                    284:                        temp = new + what_len;
                    285:                } else {
                    286:                        add = strlen(temp);
                    287:                        if (len + add + 1 >= size) {
                    288:                                size += add + 1;
                    289:                                result = realloc(result, size);
                    290:                        }
                    291:                        (void)strcpy(&result[len], temp);       /* safe */
                    292:                        len += add;
                    293:                        temp = NULL;
                    294:                }
                    295:        } while (temp);
                    296:        result[len] = '\0';
                    297:
                    298:        return result;
                    299: }
                    300:
                    301: /*
                    302:  * the real function doing history expansion - takes as argument command
                    303:  * to do and data upon which the command should be executed
                    304:  * does expansion the way I've understood readline documentation
                    305:  * word designator ``%'' isn't supported (yet ?)
                    306:  *
                    307:  * returns 0 if data was not modified, 1 if it was and 2 if the string
                    308:  * should be only printed and not executed; in case of error,
                    309:  * returns -1 and *result points to NULL
                    310:  * it's callers responsibility to free() string returned in *result
                    311:  */
                    312: static int
                    313: _history_expand_command(command, len, result)
                    314:        const char     *command;
                    315:        int             len;
                    316:        char          **result;
                    317: {
                    318:        char          **arr, *temp, *line, *search = NULL, *cmd;
                    319:        const char     *event_data = NULL;
                    320:        static const char *from = NULL, *to = NULL;
                    321:        int             start = -1, end = -1, max, i, size, idx;
                    322:        int             h_on = 0, t_on = 0, r_on = 0, e_on = 0, p_on = 0,
                    323:                        g_on = 0;
                    324:        int             event_num = 0, retval;
                    325:
                    326:        *result = NULL;
                    327:
                    328:        cmd = alloca(len + 1);
                    329:        (void)strncpy(cmd, command, len);
                    330:        cmd[len] = 0;
                    331:
                    332:        idx = 1;
                    333:        /* find out which event to take */
                    334:        if (cmd[idx] == history_expansion_char) {
                    335:                event_num = history_length;
                    336:                idx++;
                    337:        } else {
                    338:                int             off, len, num;
                    339:                off = idx;
                    340:                while (cmd[off] && !strchr(":^$*-%", cmd[off]))
                    341:                        off++;
                    342:                num = atoi(&cmd[idx]);
                    343:                if (num != 0) {
                    344:                        event_num = num;
                    345:                        if (num < 0)
                    346:                                event_num += history_length + 1;
                    347:                } else {
                    348:                        int prefix = 1, curr_num;
                    349:                        HistEvent ev;
                    350:
                    351:                        len = off - idx;
                    352:                        if (cmd[idx] == '?') {
                    353:                                idx++, len--;
                    354:                                if (cmd[off - 1] == '?')
                    355:                                        len--;
                    356:                                else if (cmd[off] != '\n' && cmd[off] != '\0')
                    357:                                        return -1;
                    358:                                prefix = 0;
                    359:                        }
                    360:                        search = alloca(len + 1);
                    361:                        (void)strncpy(search, &cmd[idx], len);
                    362:                        search[len] = '\0';
                    363:
                    364:                        if (history(h, &ev, H_CURR) != 0)
                    365:                                return -1;
                    366:                        curr_num = ev.num;
                    367:
                    368:                        if (prefix)
                    369:                                retval = history_search_prefix(search, -1);
                    370:                        else
                    371:                                retval = history_search(search, -1);
                    372:
                    373:                        if (retval == -1) {
                    374:                                fprintf(rl_outstream, "%s: Event not found\n",
                    375:                                        search);
                    376:                                return -1;
                    377:                        }
                    378:                        if (history(h, &ev, H_CURR) != 0)
                    379:                                return -1;
                    380:                        event_data = ev.str;
                    381:
                    382:                        /* roll back to original position */
                    383:                        history(h, &ev, H_NEXT_EVENT, curr_num);
                    384:                }
                    385:                idx = off;
                    386:        }
                    387:
                    388:        if (!event_data && event_num >= 0) {
1.2       christos  389:                HIST_ENTRY *rl_he;
1.1       christos  390:                rl_he = history_get(event_num);
                    391:                if (!rl_he)
                    392:                        return 0;
                    393:                event_data = rl_he->line;
                    394:        } else
                    395:                return -1;
                    396:
                    397:        if (cmd[idx] != ':')
                    398:                return -1;
                    399:        cmd += idx + 1;
                    400:
                    401:        /* recognize cmd */
                    402:        if (*cmd == '^')
                    403:                start = end = 1, cmd++;
                    404:        else if (*cmd == '$')
                    405:                start = end = -1, cmd++;
                    406:        else if (*cmd == '*')
                    407:                start = 1, end = -1, cmd++;
1.4     ! christos  408:        else if (isdigit((unsigned char) *cmd)) {
1.1       christos  409:                const char *temp;
                    410:                int shifted = 0;
                    411:
                    412:                start = atoi(cmd);
                    413:                temp = cmd;
1.4     ! christos  414:                for (; isdigit((unsigned char) *cmd); cmd++);
1.1       christos  415:                if (temp != cmd)
                    416:                        shifted = 1;
                    417:                if (shifted && *cmd == '-') {
1.4     ! christos  418:                        if (!isdigit((unsigned char) *(cmd + 1)))
1.1       christos  419:                                end = -2;
                    420:                        else {
                    421:                                end = atoi(cmd + 1);
1.4     ! christos  422:                                for (; isdigit((unsigned char) *cmd); cmd++);
1.1       christos  423:                        }
                    424:                } else if (shifted && *cmd == '*')
                    425:                        end = -1, cmd++;
                    426:                else if (shifted)
                    427:                        end = start;
                    428:        }
                    429:        if (*cmd == ':')
                    430:                cmd++;
                    431:
                    432:        line = strdup(event_data);
                    433:        for (; *cmd; cmd++) {
                    434:                if (*cmd == ':')
                    435:                        continue;
                    436:                else if (*cmd == 'h')
                    437:                        h_on = 1 | g_on, g_on = 0;
                    438:                else if (*cmd == 't')
                    439:                        t_on = 1 | g_on, g_on = 0;
                    440:                else if (*cmd == 'r')
                    441:                        r_on = 1 | g_on, g_on = 0;
                    442:                else if (*cmd == 'e')
                    443:                        e_on = 1 | g_on, g_on = 0;
                    444:                else if (*cmd == 'p')
                    445:                        p_on = 1 | g_on, g_on = 0;
                    446:                else if (*cmd == 'g')
                    447:                        g_on = 2;
                    448:                else if (*cmd == 's' || *cmd == '&') {
                    449:                        char           *what, *with, delim;
                    450:                        int             len, size, from_len;
                    451:
                    452:                        if (*cmd == '&' && (from == NULL || to == NULL))
                    453:                                continue;
                    454:                        else if (*cmd == 's') {
                    455:                                delim = *(++cmd), cmd++;
                    456:                                size = 16;
                    457:                                what = realloc((void *) from, size);
                    458:                                len = 0;
                    459:                                for (; *cmd && *cmd != delim; cmd++) {
                    460:                                        if (*cmd == '\\'
                    461:                                            && *(cmd + 1) == delim)
                    462:                                                cmd++;
                    463:                                        if (len >= size)
                    464:                                                what = realloc(what,
                    465:                                                    (size <<= 1));
                    466:                                        what[len++] = *cmd;
                    467:                                }
                    468:                                what[len] = '\0';
                    469:                                from = what;
                    470:                                if (*what == '\0') {
                    471:                                        free(what);
                    472:                                        if (search)
                    473:                                                from = strdup(search);
                    474:                                        else {
                    475:                                                from = NULL;
                    476:                                                return -1;
                    477:                                        }
                    478:                                }
                    479:                                cmd++;  /* shift after delim */
                    480:                                if (!*cmd)
                    481:                                        continue;
                    482:
                    483:                                size = 16;
                    484:                                with = realloc((void *) to, size);
                    485:                                len = 0;
                    486:                                from_len = strlen(from);
                    487:                                for (; *cmd && *cmd != delim; cmd++) {
                    488:                                        if (len + from_len + 1 >= size) {
                    489:                                                size += from_len + 1;
                    490:                                                with = realloc(with, size);
                    491:                                        }
                    492:                                        if (*cmd == '&') {
                    493:                                                /* safe */
                    494:                                                (void)strcpy(&with[len], from);
                    495:                                                len += from_len;
                    496:                                                continue;
                    497:                                        }
                    498:                                        if (*cmd == '\\'
                    499:                                            && (*(cmd + 1) == delim
                    500:                                                || *(cmd + 1) == '&'))
                    501:                                                cmd++;
                    502:                                        with[len++] = *cmd;
                    503:                                }
                    504:                                with[len] = '\0';
                    505:                                to = with;
                    506:
                    507:                                temp = _rl_compat_sub(line, from, to,
                    508:                                    (g_on) ? 1 : 0);
                    509:                                free(line);
                    510:                                line = temp;
                    511:                                g_on = 0;
                    512:                        }
                    513:                }
                    514:        }
                    515:
                    516:        arr = history_tokenize(line);
                    517:        free(line);             /* no more needed */
                    518:        if (arr && *arr == NULL)
                    519:                free(arr), arr = NULL;
                    520:        if (!arr)
                    521:                return -1;
                    522:
                    523:        /* find out max valid idx to array of array */
                    524:        max = 0;
                    525:        for (i = 0; arr[i]; i++)
                    526:                max++;
                    527:        max--;
                    528:
                    529:        /* set boundaries to something relevant */
                    530:        if (start < 0)
                    531:                start = 1;
                    532:        if (end < 0)
                    533:                end = max - ((end < -1) ? 1 : 0);
                    534:
                    535:        /* check boundaries ... */
                    536:        if (start > max || end > max || start > end)
                    537:                return -1;
                    538:
                    539:        for (i = 0; i <= max; i++) {
                    540:                char           *temp;
                    541:                if (h_on && (i == 1 || h_on > 1) &&
                    542:                    (temp = strrchr(arr[i], '/')))
                    543:                        *(temp + 1) = '\0';
                    544:                if (t_on && (i == 1 || t_on > 1) &&
                    545:                    (temp = strrchr(arr[i], '/')))
                    546:                        (void)strcpy(arr[i], temp + 1);
                    547:                if (r_on && (i == 1 || r_on > 1) &&
                    548:                    (temp = strrchr(arr[i], '.')))
                    549:                        *temp = '\0';
                    550:                if (e_on && (i == 1 || e_on > 1) &&
                    551:                    (temp = strrchr(arr[i], '.')))
                    552:                        (void)strcpy(arr[i], temp);
                    553:        }
                    554:
                    555:        size = 1, len = 0;
                    556:        temp = malloc(size);
                    557:        for (i = start; start <= i && i <= end; i++) {
                    558:                int             arr_len;
                    559:
                    560:                arr_len = strlen(arr[i]);
                    561:                if (len + arr_len + 1 >= size) {
                    562:                        size += arr_len + 1;
                    563:                        temp = realloc(temp, size);
                    564:                }
                    565:                (void)strcpy(&temp[len], arr[i]);       /* safe */
                    566:                len += arr_len;
                    567:                temp[len++] = ' ';      /* add a space */
                    568:        }
1.4     ! christos  569:        while (len > 0 && isspace((unsigned char) temp[len - 1]))
1.1       christos  570:                len--;
                    571:        temp[len] = '\0';
                    572:
                    573:        *result = temp;
                    574:
                    575:        for (i = 0; i <= max; i++)
                    576:                free(arr[i]);
                    577:        free(arr), arr = (char **) NULL;
                    578:        return (p_on) ? 2 : 1;
                    579: }
                    580:
                    581: /*
                    582:  * csh-style history expansion
                    583:  */
                    584: int
                    585: history_expand(str, output)
                    586:        char           *str;
                    587:        char          **output;
                    588: {
                    589:        int             i, retval = 0, size, idx;
                    590:        char           *temp, *result;
                    591:
                    592:        if (h == NULL || e == NULL)
                    593:                rl_initialize();
                    594:
                    595:        *output = strdup(str);  /* do it early */
                    596:
                    597:        if (str[0] == history_subst_char) {
                    598:                /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
                    599:                temp = alloca(4 + strlen(str) + 1);
                    600:                temp[0] = temp[1] = history_expansion_char;
                    601:                temp[2] = ':';
                    602:                temp[3] = 's';
                    603:                (void)strcpy(temp + 4, str);
                    604:                str = temp;
                    605:        }
                    606: #define ADD_STRING(what, len)                                          \
                    607:        {                                                               \
                    608:                if (idx + len + 1 > size)                               \
                    609:                        result = realloc(result, (size += len + 1));    \
                    610:                (void)strncpy(&result[idx], what, len);                 \
                    611:                idx += len;                                             \
                    612:                result[idx] = '\0';                                     \
                    613:        }
                    614:
                    615:        result = NULL;
                    616:        size = idx = 0;
                    617:        for (i = 0; str[i];) {
                    618:                int start, j, len, loop_again;
                    619:
                    620:                loop_again = 1;
                    621:                start = j = i;
                    622: loop:
                    623:                for (; str[j]; j++) {
                    624:                        if (str[j] == '\\' &&
                    625:                            str[j + 1] == history_expansion_char) {
                    626:                                (void)strcpy(&str[j], &str[j + 1]);
                    627:                                continue;
                    628:                        }
                    629:                        if (!loop_again) {
                    630:                                if (str[j] == '?') {
                    631:                                        while (str[j] && str[++j] != '?');
                    632:                                        if (str[j] == '?')
                    633:                                                j++;
1.4     ! christos  634:                                } else if (isspace((unsigned char) str[j]))
1.1       christos  635:                                        break;
                    636:                        }
                    637:                        if (str[j] == history_expansion_char
                    638:                            && !strchr(history_no_expand_chars, str[j + 1])
                    639:                            && (!history_inhibit_expansion_function ||
                    640:                        (*history_inhibit_expansion_function) (str, j) == 0))
                    641:                                break;
                    642:                }
                    643:
                    644:                if (str[j] && str[j + 1] != '#' && loop_again) {
                    645:                        i = j;
                    646:                        j++;
                    647:                        if (str[j] == history_expansion_char)
                    648:                                j++;
                    649:                        loop_again = 0;
                    650:                        goto loop;
                    651:                }
                    652:                len = i - start;
                    653:                temp = &str[start];
                    654:                ADD_STRING(temp, len);
                    655:
                    656:                if (str[i] == '\0' || str[i] != history_expansion_char
                    657:                    || str[i + 1] == '#') {
                    658:                        len = j - i;
                    659:                        temp = &str[i];
                    660:                        ADD_STRING(temp, len);
                    661:                        if (start == 0)
                    662:                                retval = 0;
                    663:                        else
                    664:                                retval = 1;
                    665:                        break;
                    666:                }
                    667:                retval = _history_expand_command(&str[i], j - i, &temp);
                    668:                if (retval != -1) {
                    669:                        len = strlen(temp);
                    670:                        ADD_STRING(temp, len);
                    671:                }
                    672:                i = j;
                    673:        }                       /* for(i ...) */
                    674:
                    675:        if (retval == 2) {
                    676:                add_history(temp);
                    677: #ifdef GDB_411_HACK
                    678:                /* gdb 4.11 has been shipped with readline, where */
                    679:                /* history_expand() returned -1 when the line     */
                    680:                /* should not be executed; in readline 2.1+       */
                    681:                /* it should return 2 in such a case              */
                    682:                retval = -1;
                    683: #endif
                    684:        }
                    685:        free(*output);
                    686:        *output = result;
                    687:
                    688:        return retval;
                    689: }
                    690:
                    691: /*
                    692:  * returns array of tokens parsed out of string, much as the shell might
                    693:  */
                    694: char **
                    695: history_tokenize(str)
                    696:        const char     *str;
                    697: {
                    698:        int  size = 1, result_idx = 0, i, start, len;
                    699:        char **result = NULL, *temp, delim = '\0';
                    700:
                    701:        for (i = 0; str[i]; i++) {
1.4     ! christos  702:                while (isspace((unsigned char) str[i]))
1.1       christos  703:                        i++;
                    704:                start = i;
                    705:                for (; str[i]; i++) {
                    706:                        if (str[i] == '\\')
                    707:                                i++;
                    708:                        else if (str[i] == delim)
                    709:                                delim = '\0';
                    710:                        else if (!delim &&
1.4     ! christos  711:                            (isspace((unsigned char) str[i]) ||
        !           712:                            strchr("()<>;&|$", str[i])))
1.1       christos  713:                                break;
                    714:                        else if (!delim && strchr("'`\"", str[i]))
                    715:                                delim = str[i];
                    716:                }
                    717:
                    718:                if (result_idx + 2 >= size) {
                    719:                        size <<= 1;
                    720:                        result = realloc(result, size * sizeof(char *));
                    721:                }
                    722:                len = i - start;
                    723:                temp = malloc(len + 1);
                    724:                (void)strncpy(temp, &str[start], len);
                    725:                temp[len] = '\0';
                    726:                result[result_idx++] = temp;
                    727:                result[result_idx] = NULL;
                    728:        }
                    729:
                    730:        return result;
                    731: }
                    732:
                    733: /*
                    734:  * limit size of history record to ``max'' events
                    735:  */
                    736: void
                    737: stifle_history(max)
                    738:        int max;
                    739: {
                    740:        HistEvent ev;
                    741:
                    742:        if (h == NULL || e == NULL)
                    743:                rl_initialize();
                    744:
1.4     ! christos  745:        if (history(h, &ev, H_SETSIZE, max) == 0)
1.1       christos  746:                max_input_history = max;
                    747: }
                    748:
                    749: /*
                    750:  * "unlimit" size of history - set the limit to maximum allowed int value
                    751:  */
                    752: int
                    753: unstifle_history()
                    754: {
                    755:        HistEvent ev;
                    756:        int omax;
                    757:
1.4     ! christos  758:        history(h, &ev, H_SETSIZE, INT_MAX);
1.1       christos  759:        omax = max_input_history;
                    760:        max_input_history = INT_MAX;
                    761:        return omax;            /* some value _must_ be returned */
                    762: }
                    763:
                    764: int
                    765: history_is_stifled()
                    766: {
                    767:        /* cannot return true answer */
                    768:        return (max_input_history != INT_MAX);
                    769: }
                    770:
                    771: /*
                    772:  * read history from a file given
                    773:  */
                    774: int
                    775: read_history(filename)
                    776:        const char *filename;
                    777: {
                    778:        HistEvent ev;
                    779:
                    780:        if (h == NULL || e == NULL)
                    781:                rl_initialize();
                    782:        return history(h, &ev, H_LOAD, filename);
                    783: }
                    784:
                    785: /*
                    786:  * write history to a file given
                    787:  */
                    788: int
                    789: write_history(filename)
                    790:        const char *filename;
                    791: {
                    792:        HistEvent ev;
                    793:
                    794:        if (h == NULL || e == NULL)
                    795:                rl_initialize();
                    796:        return history(h, &ev, H_SAVE, filename);
                    797: }
                    798:
                    799: /*
                    800:  * returns history ``num''th event
                    801:  *
                    802:  * returned pointer points to static variable
                    803:  */
1.2       christos  804: HIST_ENTRY *
1.1       christos  805: history_get(num)
                    806:        int             num;
                    807: {
                    808:        static HIST_ENTRY she;
                    809:        HistEvent ev;
                    810:        int i = 1, curr_num;
                    811:
                    812:        if (h == NULL || e == NULL)
                    813:                rl_initialize();
                    814:
                    815:        /* rewind to beginning */
                    816:        if (history(h, &ev, H_CURR) != 0)
                    817:                return NULL;
                    818:        curr_num = ev.num;
                    819:        if (history(h, &ev, H_LAST) != 0)
                    820:                return NULL;    /* error */
                    821:        while (i < num && history(h, &ev, H_PREV) == 0)
                    822:                i++;
                    823:        if (i != num)
                    824:                return NULL;    /* not so many entries */
                    825:
                    826:        she.line = ev.str;
                    827:        she.data = NULL;
                    828:
                    829:        /* rewind history to the same event it was before */
                    830:        (void) history(h, &ev, H_FIRST);
                    831:        (void) history(h, &ev, H_NEXT_EVENT, curr_num);
                    832:
                    833:        return &she;
                    834: }
                    835:
                    836: /*
                    837:  * add the line to history table
                    838:  */
                    839: int
                    840: add_history(line)
                    841:        const char *line;
                    842: {
                    843:        HistEvent ev;
                    844:
                    845:        if (h == NULL || e == NULL)
                    846:                rl_initialize();
                    847:
                    848:        (void) history(h, &ev, H_ENTER, line);
                    849:        if (history(h, &ev, H_GETSIZE) == 0)
                    850:                history_length = ev.num;
                    851:
                    852:        return (!(history_length > 0)); /* return 0 if all is okay */
                    853: }
                    854:
                    855: /*
                    856:  * clear the history list - delete all entries
                    857:  */
                    858: void
                    859: clear_history()
                    860: {
                    861:        HistEvent ev;
                    862:        history(h, &ev, H_CLEAR);
                    863: }
                    864:
                    865: /*
                    866:  * returns offset of the current history event
                    867:  */
                    868: int
                    869: where_history()
                    870: {
                    871:        HistEvent ev;
                    872:        int curr_num, off;
                    873:
                    874:        if (history(h, &ev, H_CURR) != 0)
                    875:                return 0;
                    876:        curr_num = ev.num;
                    877:
                    878:        history(h, &ev, H_FIRST);
                    879:        off = 1;
                    880:        while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0)
                    881:                off++;
                    882:
                    883:        return off;
                    884: }
                    885:
                    886: /*
                    887:  * returns current history event or NULL if there is no such event
                    888:  */
1.2       christos  889: HIST_ENTRY *
1.1       christos  890: current_history()
                    891: {
                    892:        return _move_history(H_CURR);
                    893: }
                    894:
                    895: /*
                    896:  * returns total number of bytes history events' data are using
                    897:  */
                    898: int
                    899: history_total_bytes()
                    900: {
                    901:        HistEvent ev;
                    902:        int curr_num, size;
                    903:
                    904:        if (history(h, &ev, H_CURR) != 0)
                    905:                return -1;
                    906:        curr_num = ev.num;
                    907:
                    908:        history(h, &ev, H_FIRST);
                    909:        size = 0;
                    910:        do
                    911:                size += strlen(ev.str);
                    912:        while (history(h, &ev, H_NEXT) == 0);
                    913:
                    914:        /* get to the same position as before */
                    915:        history(h, &ev, H_PREV_EVENT, curr_num);
                    916:
                    917:        return size;
                    918: }
                    919:
                    920: /*
                    921:  * sets the position in the history list to ``pos''
                    922:  */
                    923: int
                    924: history_set_pos(pos)
                    925:        int pos;
                    926: {
                    927:        HistEvent ev;
                    928:        int off, curr_num;
                    929:
                    930:        if (pos > history_length || pos < 0)
                    931:                return -1;
                    932:
                    933:        history(h, &ev, H_CURR);
                    934:        curr_num = ev.num;
                    935:        history(h, &ev, H_FIRST);
                    936:        off = 0;
                    937:        while (off < pos && history(h, &ev, H_NEXT) == 0)
                    938:                off++;
                    939:
                    940:        if (off != pos) {       /* do a rollback in case of error */
                    941:                history(h, &ev, H_FIRST);
                    942:                history(h, &ev, H_NEXT_EVENT, curr_num);
                    943:                return -1;
                    944:        }
                    945:        return 0;
                    946: }
                    947:
                    948: /*
                    949:  * returns previous event in history and shifts pointer accordingly
                    950:  */
1.2       christos  951: HIST_ENTRY *
1.1       christos  952: previous_history()
                    953: {
                    954:        return _move_history(H_PREV);
                    955: }
                    956:
                    957: /*
                    958:  * returns next event in history and shifts pointer accordingly
                    959:  */
1.2       christos  960: HIST_ENTRY *
1.1       christos  961: next_history()
                    962: {
                    963:        return _move_history(H_NEXT);
                    964: }
                    965:
                    966: /*
                    967:  * generic history search function
                    968:  */
                    969: static int
                    970: _history_search_gen(str, direction, pos)
                    971:        const char *str;
                    972:        int direction, pos;
                    973: {
                    974:        HistEvent       ev;
                    975:        const char     *strp;
                    976:        int             curr_num;
                    977:
                    978:        if (history(h, &ev, H_CURR) != 0)
                    979:                return -1;
                    980:        curr_num = ev.num;
                    981:
                    982:        for (;;) {
                    983:                strp = strstr(ev.str, str);
                    984:                if (strp && (pos < 0 || &ev.str[pos] == strp))
                    985:                        return (int) (strp - ev.str);
                    986:                if (history(h, &ev, direction < 0 ? H_PREV : H_NEXT) != 0)
                    987:                        break;
                    988:        }
                    989:
                    990:        history(h, &ev, direction < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
                    991:
                    992:        return -1;
                    993: }
                    994:
                    995: /*
                    996:  * searches for first history event containing the str
                    997:  */
                    998: int
                    999: history_search(str, direction)
                   1000:        const char     *str;
                   1001:        int             direction;
                   1002: {
                   1003:        return _history_search_gen(str, direction, -1);
                   1004: }
                   1005:
                   1006: /*
                   1007:  * searches for first history event beginning with str
                   1008:  */
                   1009: int
                   1010: history_search_prefix(str, direction)
                   1011:        const char     *str;
                   1012:        int             direction;
                   1013: {
                   1014:        return _history_search_gen(str, direction, 0);
                   1015: }
                   1016:
                   1017: /*
                   1018:  * search for event in history containing str, starting at offset
                   1019:  * abs(pos); continue backward, if pos<0, forward otherwise
                   1020:  */
                   1021: int
                   1022: history_search_pos(str, direction, pos)
                   1023:        const char     *str;
                   1024:        int             direction, pos;
                   1025: {
                   1026:        HistEvent       ev;
                   1027:        int             curr_num, off;
                   1028:
                   1029:        off = (pos > 0) ? pos : -pos;
                   1030:        pos = (pos > 0) ? 1 : -1;
                   1031:
                   1032:        if (history(h, &ev, H_CURR) != 0)
                   1033:                return -1;
                   1034:        curr_num = ev.num;
                   1035:
                   1036:        if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0)
                   1037:                return -1;
                   1038:
                   1039:
                   1040:        for (;;) {
                   1041:                if (strstr(ev.str, str))
                   1042:                        return off;
                   1043:                if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
                   1044:                        break;
                   1045:        }
                   1046:
                   1047:        /* set "current" pointer back to previous state */
                   1048:        history(h, &ev, (pos < 0) ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
                   1049:
                   1050:        return -1;
                   1051: }
                   1052:
                   1053:
                   1054: /********************************/
                   1055: /* completition functions       */
                   1056:
                   1057: /*
                   1058:  * does tilde expansion of strings of type ``~user/foo''
                   1059:  * if ``user'' isn't valid user name or ``txt'' doesn't start
                   1060:  * w/ '~', returns pointer to strdup()ed copy of ``txt''
                   1061:  *
                   1062:  * it's callers's responsibility to free() returned string
                   1063:  */
1.2       christos 1064: char *
1.1       christos 1065: tilde_expand(txt)
1.2       christos 1066:        char     *txt;
1.1       christos 1067: {
                   1068:        struct passwd  *pass;
                   1069:        char           *temp;
                   1070:        size_t          len = 0;
                   1071:
                   1072:        if (txt[0] != '~')
                   1073:                return strdup(txt);
                   1074:
                   1075:        temp = strchr(txt + 1, '/');
                   1076:        if (temp == NULL)
                   1077:                temp = strdup(txt + 1);
                   1078:        else {
                   1079:                len = temp - txt + 1;   /* text until string after slash */
                   1080:                temp = malloc(len);
                   1081:                (void)strncpy(temp, txt + 1, len - 2);
                   1082:                temp[len - 2] = '\0';
                   1083:        }
                   1084:        pass = getpwnam(temp);
                   1085:        free(temp);             /* value no more needed */
                   1086:        if (pass == NULL)
                   1087:                return strdup(txt);
                   1088:
                   1089:        /* update pointer txt to point at string immedially following */
                   1090:        /* first slash */
                   1091:        txt += len;
                   1092:
                   1093:        temp = malloc(strlen(pass->pw_dir) + 1 + strlen(txt) + 1);
                   1094:        (void)sprintf(temp, "%s/%s", pass->pw_dir, txt);
                   1095:
                   1096:        return temp;
                   1097: }
                   1098:
                   1099: /*
                   1100:  * return first found file name starting by the ``text'' or NULL if no
                   1101:  * such file can be found
                   1102:  * value of ``state'' is ignored
                   1103:  *
                   1104:  * it's caller's responsibility to free returned string
                   1105:  */
                   1106: char           *
                   1107: filename_completion_function(text, state)
                   1108:        const char     *text;
                   1109:        int             state;
                   1110: {
                   1111:        static DIR     *dir = NULL;
                   1112:        static char    *filename = NULL, *dirname = NULL;
                   1113:        static size_t   filename_len = 0;
                   1114:        struct dirent  *entry;
                   1115:        char           *temp;
                   1116:        size_t          len;
                   1117:
                   1118:        if (state == 0 || dir == NULL) {
                   1119:                if (dir != NULL) {
                   1120:                        closedir(dir);
                   1121:                        dir = NULL;
                   1122:                }
                   1123:                temp = strrchr(text, '/');
                   1124:                if (temp) {
                   1125:                        temp++;
                   1126:                        filename = realloc(filename, strlen(temp) + 1);
                   1127:                        (void)strcpy(filename, temp);
                   1128:                        len = temp - text;      /* including last slash */
                   1129:                        dirname = realloc(dirname, len + 1);
                   1130:                        (void)strncpy(dirname, text, len);
                   1131:                        dirname[len] = '\0';
                   1132:                } else {
                   1133:                        filename = strdup(text);
                   1134:                        dirname = NULL;
                   1135:                }
                   1136:
                   1137:                /* support for ``~user'' syntax */
                   1138:                if (dirname && *dirname == '~') {
                   1139:                        temp = tilde_expand(dirname);
                   1140:                        dirname = realloc(dirname, strlen(temp) + 1);
                   1141:                        (void)strcpy(dirname, temp);    /* safe */
                   1142:                        free(temp);     /* no more needed */
                   1143:                }
                   1144:                /* will be used in cycle */
                   1145:                filename_len = strlen(filename);
                   1146:                if (filename_len == 0)
                   1147:                        return NULL;    /* no expansion possible */
                   1148:
                   1149:                dir = opendir(dirname ? dirname : ".");
                   1150:                if (!dir)
                   1151:                        return NULL;    /* cannot open the directory */
                   1152:        }
                   1153:        /* find the match */
                   1154:        while ((entry = readdir(dir))) {
                   1155:                /* otherwise, get first entry where first */
                   1156:                /* filename_len characters are equal      */
                   1157:                if (entry->d_name[0] == filename[0]
1.4     ! christos 1158: #ifndef __SVR4
1.1       christos 1159:                    && entry->d_namlen >= filename_len
1.4     ! christos 1160: #else
        !          1161:                    && strlen(entry->d_name) >= filename_len
        !          1162: #endif
1.1       christos 1163:                    && strncmp(entry->d_name, filename,
                   1164:                               filename_len) == 0)
                   1165:                        break;
                   1166:        }
                   1167:
                   1168:        if (entry) {            /* match found */
                   1169:
                   1170:                struct stat     stbuf;
1.4     ! christos 1171: #ifndef __SVR4
1.1       christos 1172:                len = entry->d_namlen +
1.4     ! christos 1173: #else
        !          1174:                len = strlen(entry->d_name) +
        !          1175: #endif
1.1       christos 1176:                        ((dirname) ? strlen(dirname) : 0) + 1 + 1;
                   1177:                temp = malloc(len);
                   1178:                (void)sprintf(temp, "%s%s",
                   1179:                        dirname ? dirname : "", entry->d_name); /* safe */
                   1180:
                   1181:                /* test, if it's directory */
                   1182:                if (stat(temp, &stbuf) == 0 && S_ISDIR(stbuf.st_mode))
                   1183:                        strcat(temp, "/");      /* safe */
                   1184:        } else
                   1185:                temp = NULL;
                   1186:
                   1187:        return temp;
                   1188: }
                   1189:
                   1190: /*
                   1191:  * a completion generator for usernames; returns _first_ username
                   1192:  * which starts with supplied text
                   1193:  * text contains a partial username preceded by random character
                   1194:  * (usually '~'); state is ignored
                   1195:  * it's callers responsibility to free returned value
                   1196:  */
                   1197: char           *
                   1198: username_completion_function(text, state)
                   1199:        const char     *text;
                   1200:        int             state;
                   1201: {
                   1202:        struct passwd  *pwd;
                   1203:
                   1204:        if (text[0] == '\0')
                   1205:                return NULL;
                   1206:
                   1207:        if (*text == '~')
                   1208:                text++;
                   1209:
                   1210:        if (state == 0)
                   1211:                setpwent();
                   1212:
                   1213:        while ((pwd = getpwent()) && text[0] == pwd->pw_name[0]
                   1214:               && strcmp(text, pwd->pw_name) == 0);
                   1215:
                   1216:        if (pwd == NULL) {
                   1217:                endpwent();
                   1218:                return NULL;
                   1219:        }
                   1220:        return strdup(pwd->pw_name);
                   1221: }
                   1222:
                   1223: /*
                   1224:  * el-compatible wrapper around rl_complete; needed for key binding
                   1225:  */
                   1226: static unsigned char
                   1227: _el_rl_complete(el, ch)
                   1228:        EditLine       *el;
                   1229:        int             ch;
                   1230: {
                   1231:        return (unsigned char) rl_complete(0, ch);
                   1232: }
                   1233:
                   1234: /*
                   1235:  * returns list of completitions for text given
                   1236:  */
                   1237: char          **
                   1238: completion_matches(text, genfunc)
                   1239:        const char     *text;
                   1240:        CPFunction     *genfunc;
                   1241: {
                   1242:        char          **match_list = NULL, *retstr, *prevstr;
                   1243:        size_t          matches, math_list_len, max_equal, len, which,
                   1244:                        i;
                   1245:
                   1246:        if (h == NULL || e == NULL)
                   1247:                rl_initialize();
                   1248:
                   1249:        matches = 0;
                   1250:        math_list_len = 1;
                   1251:        while ((retstr = (*genfunc) (text, matches))) {
                   1252:                if (matches + 1 >= math_list_len) {
                   1253:                        math_list_len <<= 1;
                   1254:                        match_list = realloc(match_list,
                   1255:                            math_list_len * sizeof(char *));
                   1256:                }
                   1257:                match_list[++matches] = retstr;
                   1258:        }
                   1259:
                   1260:        if (!match_list)
                   1261:                return (char **) NULL;  /* nothing found */
                   1262:
                   1263:        /* find least denominator and insert it to match_list[0] */
                   1264:        which = 2;
                   1265:        prevstr = match_list[1];
                   1266:        len = max_equal = strlen(prevstr);
                   1267:        for (; which < matches; which++) {
                   1268:                for (i = 0; i < max_equal &&
                   1269:                    prevstr[i] == match_list[which][i]; i++)
                   1270:                        continue;
                   1271:                max_equal = i;
                   1272:        }
                   1273:
                   1274:        retstr = malloc(max_equal + 1);
                   1275:        (void)strncpy(retstr, match_list[1], max_equal);
                   1276:        retstr[max_equal] = '\0';
                   1277:        match_list[0] = retstr;
                   1278:
                   1279:        /* add NULL as last pointer to the array */
                   1280:        if (matches + 1 >= math_list_len)
                   1281:                match_list = realloc(match_list,
                   1282:                    (math_list_len + 1) * sizeof(char *));
                   1283:        match_list[matches + 1] = (char *) NULL;
                   1284:
                   1285:        return match_list;
                   1286: }
                   1287:
                   1288: /*
                   1289:  * called by rl_complete()
                   1290:  */
                   1291: static int
                   1292: rl_complete_internal(what_to_do)
                   1293:        int             what_to_do;
                   1294: {
                   1295:        CPFunction     *complet_func;
                   1296:        const LineInfo *li;
                   1297:        char           *temp, *temp2, **arr;
                   1298:        int             len;
                   1299:
                   1300:        if (h == NULL || e == NULL)
                   1301:                rl_initialize();
                   1302:
                   1303:        complet_func = rl_completion_entry_function;
                   1304:        if (!complet_func)
                   1305:                complet_func = filename_completion_function;
                   1306:
                   1307:        li = el_line(e);
                   1308:        temp = (char *) li->cursor;
                   1309:        while (temp > li->buffer &&
                   1310:            !strchr(rl_basic_word_break_characters, *(temp - 1)))
                   1311:                temp--;
                   1312:
                   1313:        len = li->cursor - temp;
                   1314:        temp2 = alloca(len + 1);
                   1315:        (void)strncpy(temp2, temp, len);
                   1316:        temp = temp2;
                   1317:        temp[len] = '\0';
                   1318:
                   1319:        /* these can be used by function called in completion_matches() */
                   1320:        /* or (*rl_attempted_completion_function)() */
                   1321:        rl_point = li->cursor - li->buffer;
                   1322:        rl_end = li->lastchar - li->buffer;
                   1323:
                   1324:        if (!rl_attempted_completion_function)
                   1325:                arr = completion_matches(temp, complet_func);
                   1326:        else {
                   1327:                int             end = li->cursor - li->buffer;
                   1328:                arr = (*rl_attempted_completion_function) (temp,
                   1329:                                                           end - len, end);
                   1330:        }
                   1331:        free(temp);             /* no more needed */
                   1332:
                   1333:        if (arr) {
                   1334:                int             i;
                   1335:
                   1336:                el_deletestr(e, len);
                   1337:                el_insertstr(e, arr[0]);
                   1338:                if (strcmp(arr[0], arr[1]) == 0) {
                   1339:                        /* lcd is valid object, so add a space to mark it */
                   1340:                        /* in case of filename completition, add a space  */
                   1341:                        /* only if object found is not directory          */
                   1342:                        int             len = strlen(arr[0]);
                   1343:                        if (complet_func != filename_completion_function
                   1344:                            || (len > 0 && (arr[0])[len - 1] != '/'))
                   1345:                                el_insertstr(e, " ");
                   1346:                } else
                   1347:                        /* lcd is not a valid object - further specification */
                   1348:                        /* is needed */
1.4     ! christos 1349:                        el_beep(e);
1.1       christos 1350:
                   1351:                /* free elements of array and the array itself */
                   1352:                for (i = 0; arr[i]; i++)
                   1353:                        free(arr[i]);
                   1354:                free(arr), arr = NULL;
                   1355:
                   1356:                return CC_REFRESH;
                   1357:        }
                   1358:        return CC_NORM;
                   1359: }
                   1360:
                   1361: /*
                   1362:  * complete word at current point
                   1363:  */
                   1364: int
                   1365: rl_complete(ignore, invoking_key)
                   1366:        int             ignore, invoking_key;
                   1367: {
                   1368:        if (h == NULL || e == NULL)
                   1369:                rl_initialize();
                   1370:
                   1371:        if (rl_inhibit_completion) {
                   1372:                rl_insert(ignore, invoking_key);
                   1373:                return CC_REFRESH;
                   1374:        } else
                   1375:                return rl_complete_internal(invoking_key);
                   1376:
                   1377:        return CC_REFRESH;
                   1378: }
                   1379:
                   1380: /*
                   1381:  * misc other functions
                   1382:  */
                   1383:
                   1384: /*
                   1385:  * bind key c to readline-type function func
                   1386:  */
                   1387: int
                   1388: rl_bind_key(c, func)
                   1389:        int             c;
                   1390:        int func        __P((int, int));
                   1391: {
                   1392:        int             retval = -1;
                   1393:
                   1394:        if (h == NULL || e == NULL)
                   1395:                rl_initialize();
                   1396:
                   1397:        if (func == rl_insert) {
                   1398:                /* XXX notice there is no range checking of ``c'' */
                   1399:                e->el_map.key[c] = ED_INSERT;
                   1400:                retval = 0;
                   1401:        }
                   1402:        return retval;
                   1403: }
                   1404:
                   1405: /*
                   1406:  * read one key from input - handles chars pushed back
                   1407:  * to input stream also
                   1408:  */
                   1409: int
                   1410: rl_read_key()
                   1411: {
                   1412:        char            fooarr[2 * sizeof(int)];
                   1413:
                   1414:        if (e == NULL || h == NULL)
                   1415:                rl_initialize();
                   1416:
                   1417:        return el_getc(e, fooarr);
                   1418: }
                   1419:
                   1420: /*
                   1421:  * reset the terminal
                   1422:  */
                   1423: void
                   1424: rl_reset_terminal(p)
                   1425:        const char     *p;
                   1426: {
                   1427:        if (h == NULL || e == NULL)
                   1428:                rl_initialize();
                   1429:        el_reset(e);
                   1430: }
                   1431:
                   1432: /*
                   1433:  * insert character ``c'' back into input stream, ``count'' times
                   1434:  */
                   1435: int
                   1436: rl_insert(count, c)
                   1437:        int             count, c;
                   1438: {
                   1439:        char            arr[2];
                   1440:
                   1441:        if (h == NULL || e == NULL)
                   1442:                rl_initialize();
                   1443:
                   1444:        /* XXX - int -> char conversion can lose on multichars */
                   1445:        arr[0] = c;
                   1446:        arr[1] = '\0';
                   1447:
                   1448:        for (; count > 0; count--)
                   1449:                el_push(e, arr);
                   1450:
                   1451:        return 0;
                   1452: }

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